Age | Commit message (Collapse) | Author | Files | Lines |
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1. add integer signed add/subu and unsigend add/sub saturation function
2. merge these with mulhi helper
Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
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Resolves #76
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It's not ideal, because it requires modifying tracer.h. A more general
facility would allow overriding the instruction execution function for
a given opcode dynamically.
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It is nonstandard, and GCC doesn't support it on 32-bit platforms. The
resulting code for MULH[[S]U] is crappier, but that doesn't really matter,
as these instructions are dynamically infrequent.
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